kernel/semaphore/sem_timedwait.c : Fix description of successful return
kernel/semaphore/sem_timedwait.c : Fix description of successful return

sem_timedwait returns 0 on success.

Signed-off-by: jeongchanKim <dd29dda359f9c9995ad03eb5d0e774929bcceb5c@samsung.com>

Samsung/TizenRT,pillip8282/TizenRT,an4967/TizenRT,jeongchanKim/TizenRT,sunghan-chang/TizenRT,pillip8282/TizenRT,pillip8282/TizenRT,Samsung/TizenRT,pillip8282/TizenRT,junmin-kim/TizenRT,jeongarmy/TizenRT,pillip8282/TizenRT,sunghan-chang/TizenRT,jeongchanKim/TizenRT,junmin-kim/TizenRT,Samsung/TizenRT,jeongarmy/TizenRT,jeongchanKim/TizenRT,jsdosa/TizenRT,Samsung/TizenRT,sunghan-chang/TizenRT,jeongchanKim/TizenRT,an4967/TizenRT,an4967/TizenRT,jeongchanKim/TizenRT,jsdosa/TizenRT,an4967/TizenRT,jeongarmy/TizenRT,Samsung/TizenRT,junmin-kim/TizenRT,junmin-kim/TizenRT,jsdosa/TizenRT,junmin-kim/TizenRT,an4967/TizenRT,jeongchanKim/TizenRT,sunghan-chang/TizenRT,jeongarmy/TizenRT,sunghan-chang/TizenRT,jeongarmy/TizenRT,Samsung/TizenRT,jsdosa/TizenRT,sunghan-chang/TizenRT,jsdosa/TizenRT,an4967/TizenRT,jsdosa/TizenRT,pillip8282/TizenRT,an4967/TizenRT,junmin-kim/TizenRT,pillip8282/TizenRT,jeongchanKim/TizenRT,jeongarmy/TizenRT,jeongarmy/TizenRT,sunghan-chang/TizenRT,Samsung/TizenRT,junmin-kim/TizenRT,jsdosa/TizenRT